A kickboxing champ and a reporter are searching for a missing man, but they turn up a series of illegal kickboxing matches run by an arms dealer.

A karate expert enters a deadly underground tournament to avenge one of his students who was killed there and stop the disgraced marshal arts champion who organized this deadly competition.

Kick-box champion David Sloan arrives in Rio de Janeiro for an exhibition fight. He and mentor Xian take pity on Brazilian rascal Marcos Coasta, an urchin who offers guide services but routinely steals from tourists for himself and his older sister Isabella. David is shocked when he sees how his Argentinian opponent Marcelo needlessly abuses a courteous local sparing partner. That’s the doing of his evil US manager, Lane. He has nasty plans to force David to cheat and runs a white slavery racket.